the.com/convection
Heat that gets up and walks instead of waiting its turn like conduction.
means The transfer of heat through the movement of a fluid (liquid or gas), as warmer, less dense material rises and cooler, denser material sinks to take its place.
from From Latin convectionem, 'the act of carrying together,' built from com- ('together') and vehere ('to carry'—the same root that gives us 'vehicle' and 'convey'). The word entered English in the 1800s through physics and meteorology, as scientists needed a term for heat that doesn't just creep through a material but gets physically carried along by a moving current—exactly what the Latin root already implied, long before anyone drew a diagram of a boiling pot.
- the trick
- warm fluid rises, cold fluid sinks, repeat forever
- real scale
- drives weather, ocean currents, and Earth's molten mantle
- oven myth
- convection ovens just add a fan to speed heat transfer
- cosmic version
- the sun's surface boils because of convection cells below